Apple migrant: Closest Android thing to shared PhotoStream and iCloud?

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http://androidforums.com – I’m a tech guy but an Android newbie so please bear with me J To me one of the most attractive features of Apple ecosystem is iCloud because it’s so transparent, unobtrusive and efficient. That especially applies to photos/videos via PhotoStream. Is there something like this in Android world? Something platform agnostic that I can “set it and forget it” and that will sync through the cloud with my PC and other devices like iPad and another Android phone. All this without wasting too much memory, battery and CPU? Thanks. (General)